NPR

Tumor Test Helps Identify Which Breast Cancers Don't Require Extra Treatment

Researchers say the test, which measures gene activity, can help avoid "overtreating" tumors that are not life-threatening. It might allow some patients to avoid radiation and chemotherapy.
Mammography has helped increase the early detection of breast tumors. Now, researchers say, the goal is to discern which of those tumors need aggressive treatment, including chemotherapy or radiation after surgery. / Chicago Tribune / Getty Images

For years, doctors have focused on detecting breast cancer at the earliest possible moment after a tumor develops so treatment can start right away. But more and more studies are showing many small, early tumors don't present a danger.

So, when is it safe to remove a tumor but skip additional treatments like tamoxifen, chemotherapy and radiation?

A published Thursday in suggests that it may be possible to distinguish fairly precisely between "ultralow-risk" tumors that are unlikely to cause problems and those that are more aggressive and likely to spread —

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